WO2006024648A1 - Organe d'affichage de rapports de pression - Google Patents

Organe d'affichage de rapports de pression Download PDF

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Publication number
WO2006024648A1
WO2006024648A1 PCT/EP2005/054285 EP2005054285W WO2006024648A1 WO 2006024648 A1 WO2006024648 A1 WO 2006024648A1 EP 2005054285 W EP2005054285 W EP 2005054285W WO 2006024648 A1 WO2006024648 A1 WO 2006024648A1
Authority
WO
WIPO (PCT)
Prior art keywords
zone
display
display means
pressure
display device
Prior art date
Application number
PCT/EP2005/054285
Other languages
German (de)
English (en)
Inventor
Simon James Naylor
Sameer Shirgaonkar
James Beeching Neave
Craig Duncan Webster
Original Assignee
BSH Bosch und Siemens Hausgeräte GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to EP05786869.7A priority Critical patent/EP1789766B1/fr
Publication of WO2006024648A1 publication Critical patent/WO2006024648A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08—Means for indicating or recording, e.g. for remote indication
    • G01L19/12—Alarms or signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
    • G01L7/08—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
    • G01L13/025—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08—Means for indicating or recording, e.g. for remote indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08—Means for indicating or recording, e.g. for remote indication
    • G01L19/10—Means for indicating or recording, e.g. for remote indication mechanical
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0042—Constructional details associated with semiconductive diaphragm sensors, e.g. etching, or constructional details of non-semiconductive diaphragms
    • G01L9/0044—Constructional details of non-semiconductive diaphragms

Definitions

  • the present invention relates to means for displaying a pressure ratio, in particular of two zones, each at air pressure and reduced air pressure.
  • the pressure of aspirated compartments and other compartments is usually measured and monitored by means of suitable measuring instruments with different degrees of complexity.
  • suitable measuring instruments with different degrees of complexity.
  • a particularly relevant application for this task is that of household refrigerators with a vacuum compartment for storing food under vacuum conditions to provide improved sterility and, therefore, longer shelf life of products that would otherwise be affected by bacteria.
  • a costly vacuum indicator of the conventional type is not required for such a simple purpose.
  • a display means for displaying a pressure ratio between a first zone under atmospheric pressure and a second zone, which is of the the first zone is separated by a boundary wall and can be sucked to reduced air pressureticiange ⁇ , wherein the display means comprises an element which is installed and arranged in the boundary wall to at negative pressure in the second zone from a first position, the substantially equivalent Indicates pressures in the zones indicating a second position indicating a pressure in the second zone that is less than that in the first zone to be deflected.
  • the display means according to the invention provides a simple and inexpensive means for obtaining an indication of a vacuum level in the second zone by the use of a displacement force generated by the vacuum itself and an element formed in the boundary wall between the first and second zones is installed, acts.
  • the vacuum level can be assessed by looking at the element or at an associated display so that, for example, it is immediately possible for the user of equipment equipped with the display to ensure that an effective reduced air pressure is reached was or is not or is maintained.
  • the element is arranged to be deflectable only to the second position when the pressure in the second zone is lower by a predetermined amount than in the first zone so that the deflection is actually initiated at a selected pressure threshold ,
  • Such an arrangement may allow, for example, immediate distinction between a reduced air pressure still above a desired level represented by the threshold and a reduced air pressure at or below the desired level. This distinction is supported, when the element remains in the first and second positions in an unchanged state, that is bistable.
  • the element may be arranged to suddenly move from the first position to the second position, and the display means may emit a slightly audible tone, in particular a sharp pop or similar tone, to the user to create the desired vacuum conditions to draw attention in the second zone.
  • the element can be deflected by negative pressure in the second zone so that the second position gradually changes with the progressive reduction of the pressure in the second zone.
  • the gradual change in the second position of the element allows the monitoring of a gradual increase in the reduced air pressure, whether by inspection or by a derived signal or indication.
  • the element is arranged to be deflectable to a second position against a tension which tends to hold the element in the first position, in which case the tension is for example by a resilient construction of the element itself or by resilient means, such as a coil, a leaf spring, or other type of spring that is structurally separate from the element.
  • the deflecting capability of the element can be realized, for example, by connecting the element to an environmental zone of the boundary wall by a flexible connection, which may for example consist of an outer annular section of the element.
  • the bending of the annular portion may be enhanced by forming the portion with undulations that provide the member with a stretching and contracting capability - A -
  • the element may have a non-deflectable central portion within the annular portion, for example a flexible central portion which may change its shape between the first and second positions.
  • the central portion may have a concavo-convex shape.
  • the shape and the means of the element may be such that it projects into the first zone when in the first position and additionally or alternatively into the second zone when in the second position.
  • the display means can be provided particularly economically if the element is formed in one piece with the boundary wall, as is formed, for example, by a flexible section of this wall.
  • the element may also be formed separately from and sealed to the wall.
  • the element is set up in such a way that its positions can be determined during use by visual inspection from the first zone.
  • the element should be exposed to the view from the first zone so that its first and second positions are visible and easily distinguishable from one another.
  • the display means can enclose a display which delivers position-dependent displays. The display may then be located at a distance from the element, and in particular at a selected position suitable for viewing.
  • the display can be mechanically operated, as for example by a direct mechanical coupling between the element and a component of the display or alternatively electrical, optical, magnetic, electro-magnetic or optoelectronic.
  • Such a display may be operated to provide a visual indication of the To provide pressure levels in the second zone, for example, a representation of the current pressure or perhaps a symbolic representation of the achievement of a predetermined pressure level, such as a change in a color display.
  • the indicator means may also be operated to provide a control signal for controlling control means in response to the position of the element, such that a control function may be triggered by the achievement of a desired vacuum level in the second zone.
  • the invention also relates to a refrigerator comprising a suctionable storage compartment for storing at reduced air pressure, means for extracting the compartment and means for indicating as described above, wherein the boundary wall in this case is a wall containing the compartment or the suction means separates from a neighboring room under atmospheric pressure.
  • the refrigerator may, for example, be a refrigerator, a combination refrigerator / freezer or other such device in which a storage compartment is provided, for example to store food under vacuum conditions.
  • the adjacent space in the device may be another storage compartment, for example, a compartment for storing at atmospheric pressure.
  • the boundary wall in this case is a wall separating the two compartments.
  • the boundary wall may be a component of the suction means itself, such as a duct wall or wall of a suction pump.
  • the device may further comprise control means which are operated in response to the position of the element of the display means, such control means comprising, for example, a pump of the suction means or a door lock for a door of the extractable storage compartment.
  • control means comprising, for example, a pump of the suction means or a door lock for a door of the extractable storage compartment.
  • the deflectable element of the indicating means can therefore, be used to trigger an associated control function in response to the second position being occupied by the element.
  • Fig. 1 is a schematic perspective
  • Fig. 2A and 2B are schematic cross sections of a first
  • Embodiment of the display means each showing two states indicating two different pressure ratios
  • FIGS. 3A and 3B are schematic cross sections of a second
  • Embodiment of the display means which again show two states indicating two different pressure ratios.
  • the vacuum storage compartment comprising a box-shaped body 11, which can be closed by a door 12 on the front of the device, is located in or adjacent to another storage compartment (not shown) with normal Air pressure.
  • An exhaust system with a pump, lines and valves is connected to the vacuum storage compartment 10 and serves to generate and maintain a predetermined or selectable low pressure level in the vacuum storage compartment.
  • a display device 13 is provided in the door 12 of the vacuum storage compartment.
  • the device 13 may be located in the center of the door and surrounded by a retractable and stretchable semicircular handle (not shown). However, the device may be in any position on the door or in any suitable position on the body 11.
  • the door 12 or a selected part of the body 11 constitutes a boundary wall which has a zone sucked to reduced air pressure, i. H. the interior of the vacuum storage compartment 10 from a zone under atmospheric pressure, d. H. separates the interior of the other Lager ⁇ compartment or the external environment of the device.
  • the itati ⁇ device 13 is connected to the exhaust system and the boundary wall is formed, for example, part of a pump, line or a valve member.
  • the display device 13 includes an element 14 that is built into the door 12 and constructed to be vacuumed when the vacuum storage compartment 10 is exhausted from a first position indicative of equivalent pressure in the compartments and with the door outside the compartment Vacuum storage compartment 10 adjacent zone and a second position, which indicates a lower pressure so Unterduck in the vacuum storage compartment 10 to be deflected.
  • the element 14 comprises a center section 14a in a curved shape and a bending surrounding annular section 14b, which surrounds the Center portion with the orbiting part of the door 12 connects and formed with bellows-like waves, which give the element 14 sufficient flexibility to allow the center portion 14 a, between two easily distinguishable positions or states back and forth.
  • the wavy annular portion 14b expands upon the element 14 under the influence of the negative pressure, and the center portion 14a shifts from its original position as a function of the negative pressure tendency, the volume of the vacuum storage compartment 10, d. H. to pull the boundary walls of the vacuum storage compartment inwards.
  • the center portion 14a undergoes an inversion of its domed shape, and therefore the center portion in this embodiment has a flexible structure.
  • the surrounding annular portion 14b compresses between two states during movement of the central portion 14a, but relaxes to have substantially the same shape in each of the two end positions shown.
  • the element 14 may be formed integrally with the door.
  • the flexibility of the element 13 but the relative rigidity of the remainder of the door can be achieved by forming the reduced strength element.
  • the material is preferably such that the element 14 is resilient and in particular tensioned to return to the first position shown in Figs. 2A and 3A when the internal pressure of the vacuum storage compartment 10 and the pressure of the adjacent outer space in the essential are equivalent.
  • the element 14 of the display means 13 is constructed as a separate part and in an opening of the door 12 - or at another Grenz ⁇ wall - the vacuum storage compartment 10 is attached.
  • the clamping of the element to its first position can also be performed by separate resilient means, such as a compression or leaf spring, whether the element is built in one piece with or separate from the door.
  • the structure of element 14 is preferably such that it is bistable with respect to the first and second positions.
  • the flexibility may be such that the transition from the first to the second position only takes place when a predetermined low pressure level is reached inside the vacuum storage compartment 10. This may provide a snap action of the element such that it transitions to the second position relatively suddenly due to the vacuum build up to a threshold.
  • the snap effect may be accompanied by a relatively sharp popping sound when the element changes position and generates a pressure wave.
  • the movement can also be gradual up to the second position.
  • the element in the second position can continue to adjust with the increasing negative pressure, so that a gradual indication of the progressing vacuum level is provided.
  • the element 14 is placed in a position where it can be visually inspected, so that the existence of a desired sucked state of the vacuum storage compartment really by judging the physical position of the element 14, including the mold, if a change of shape occurs between the first and the second position, in particular of its middle section 14b.
  • the display means may additionally or alternatively for suchcht ⁇ unit of visual inspection include a display that records the change of position and / or the current vacuum level.
  • Such an indication could include, for example, triggering a display of a different color, such as green, as opposed to red, as the item passes from the first position to the second position.
  • the positional change of the element may also be used to trigger the operation of an associated function, for example, turning off the pump of the exhaust system upon reaching the second position or releasing a door lock upon return to the first position.
  • the display device is thus able to adapt to specific requirements and specific applications in various ways, but in its basic form represents a simple and reliable pressure-operated component, which is particularly suitable for the serial production of devices or other goods suitable is.
  • the device can equally well be used in other equipment, including land, air or sea vehicles, in which the indication of the pressure ratio between zones under atmospheric pressure and zones under reduced air pressure may be required.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

L'invention concerne un organe d'affichage permettant d'afficher le rapport de pression entre une première zone en pression atmosphérique, par exemple un compartiment de réfrigération d'un réfrigérateur, et une seconde zone, qui est séparée de la première zone par une paroi (12) de délimitation et dans laquelle un vide d'air de pression atmosphérique réduite peut être créée. Ledit organe comprend un élément (13), qui est installé dans la paroi de délimitation et configuré sous forme d'une construction souple, ce qui lui permet d'être dévié dans une première position (fig. 3A), qui affiche les pression équivalentes dans les zones, ou dans une seconde position (fig. 3B), qui affiche une pression plus faible, en particulier une pression sous vide souhaitée.
PCT/EP2005/054285 2004-09-02 2005-08-31 Organe d'affichage de rapports de pression WO2006024648A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05786869.7A EP1789766B1 (fr) 2004-09-02 2005-08-31 Organe d'affichage de rapports de pression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0419490.8 2004-09-02
GB0419490A GB2417781B8 (en) 2004-09-02 2004-09-02 Cooling apparatus with pressure relationship indicating means

Publications (1)

Publication Number Publication Date
WO2006024648A1 true WO2006024648A1 (fr) 2006-03-09

Family

ID=33155914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/054285 WO2006024648A1 (fr) 2004-09-02 2005-08-31 Organe d'affichage de rapports de pression

Country Status (3)

Country Link
EP (1) EP1789766B1 (fr)
GB (1) GB2417781B8 (fr)
WO (1) WO2006024648A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2381582A (en) * 1944-05-08 1945-08-07 Air Communications Inc Pressure switch
US4283706A (en) * 1979-04-19 1981-08-11 Honda Giken Kogyo Kabushiki Kaisha Puncture detecting device
DE3412972A1 (de) * 1984-04-06 1985-10-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Vorrichtung zum schalten elektrischer betriebsmittel
DE3731648C1 (en) * 1987-09-19 1988-10-27 Audi Ag Pressure switch (push-button switch)
US5255670A (en) * 1990-01-15 1993-10-26 Lomholt Vagn N F Air reservoir
DE10248510A1 (de) 2002-10-17 2004-04-29 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit einem evakuierbaren Lagerfach

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246624A (en) * 1965-02-05 1966-04-19 Novo Ind Corp Pressure indicating device
DE2062340A1 (de) * 1970-12-17 1972-07-20 Bystrican, Ivan, 5000 Köln Thermoschrank für den Haushalt
ZA748065B (en) * 1974-01-07 1976-01-28 Banyaszati Kutato Intezet Beer can structure
US4722451A (en) * 1986-08-22 1988-02-02 General Electric Company Synthetic polymeric resin vacuum container with indicator
GB2198541A (en) * 1986-12-11 1988-06-15 Blockfoil Ltd Indicating the condition of a surface

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2381582A (en) * 1944-05-08 1945-08-07 Air Communications Inc Pressure switch
US4283706A (en) * 1979-04-19 1981-08-11 Honda Giken Kogyo Kabushiki Kaisha Puncture detecting device
DE3412972A1 (de) * 1984-04-06 1985-10-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Vorrichtung zum schalten elektrischer betriebsmittel
DE3731648C1 (en) * 1987-09-19 1988-10-27 Audi Ag Pressure switch (push-button switch)
US5255670A (en) * 1990-01-15 1993-10-26 Lomholt Vagn N F Air reservoir
DE10248510A1 (de) 2002-10-17 2004-04-29 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit einem evakuierbaren Lagerfach

Also Published As

Publication number Publication date
GB2417781B8 (en) 2007-03-28
GB0419490D0 (en) 2004-10-06
GB2417781B (en) 2007-02-28
EP1789766B1 (fr) 2015-12-23
GB2417781A (en) 2006-03-08
EP1789766A1 (fr) 2007-05-30

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